Table 1 Descriptive characteristics of the MoBa and Generation R study populations.
Variable | Category | MoBa N (%) | Generation R N (%) |
|---|---|---|---|
Maternal plasma folate (nmol l−1) | Min–max | 1.6–53.2 | 4.1–45.3 |
Mean | 11.9 | 20.3 | |
Median | 9.1 | 19.6 | |
25–75th percentile | 6.2–16.0 | 13.3–26.4 | |
Log-transformed maternal plasma folate | Min–max | 0.48–4.0 | 1.4–3.8 |
Mean | 2.3 | 2.9 | |
Median | 2.2 | 3.0 | |
25–75th percentile | 1.8–2.8 | 2.6–3.3 | |
Maternal age (years) | Mean (s.d.) | 29.9 (4.3) | 31.5 (4.1) |
Maternal education level | Less than secondary school | 96 (7.5) | 14 (1.8) |
Secondary school completion | 415 (32.3) | 267 (34.3) | |
Some college or university | 566 (44.1) | 203 (26.0) | |
4 Years or more of college/university | 206 (16.1) | 296 (37.9) | |
Missing | 6 | 10 | |
Parity* | 0 | 537 (41.7) | 479 (60.7) |
1 | 511 (39.6) | 240 (30.4) | |
2 | 179 (13.9) | 63 (8.0) | |
3+ | 62 (4.8) | 7 (0.9) | |
Missing | 0 | 1 | |
Maternal smoking during pregnancy | No | 1098 (85.2) | 541 (75.6) |
Yes | 191 (14.8) | 175 (24.5) | |
Missing | 0 | 74 |
